-95.49% is the change from 421 to 19
Calculation steps:
[( 19 - 421 ) ÷ 421] x 100 = -95.49%
Formula
Percentage change = [(19 - 421) / 421] x 100
Subtract the new number by the original number
19 - 421 = -402
-402 ÷ 421 = -0.9548693586698337
-0.9548693586698337 x 100 = -95.49%